Vehicle body frame structure of saddle-riding type vehicle

Abstract

To provide a vehicle body frame structure of a saddle-riding type vehicle that can increase the capacity of an air cleaner and enhance the bending stiffness of the vehicle body frame. The vehicle body frame structure includes a pair of left and right main frames that extend rearwardly from a head pipe, an engine disposed downwardly of the left and right main frames, a fuel tank disposed upwardly of the engine and between the left and right main frames, a pair of left and right engine hangers that extend downwardly from front portions of the left and right main frames and support the engine, and a cross member that connects the left and right engine hangers in a vehicle width direction.

1. A vehicle body frame structure for a saddle-riding type vehicle, the vehicle including:
 a pair of left and right main frames that extend rearwardly from a head pipe; 
 an engine disposed downwardly of the left and right main frames; 
 a fuel tank disposed upwardly of the engine and between the left and right main frames; and 
 a pair of left and right engine hangers that extend downwardly from front portions of the left and right main frames, the engine hangers being configured to support the engine, the vehicle body frame structure comprising: 
 a cross member that connects the left and right engine hangers in a vehicle width direction, 
 wherein the main frames include connection holes formed therein, the connection holes being configured to connect with intake system ducts, and the cross member is disposed downwardly, or downwardly and rearwardly, of the connection holes. 
 
     
     
       2. The vehicle body frame structure according to  claim 1 , wherein the cross member is disposed rearwardly of the connection holes and forwardly of a widest distance between the left and right main frames in the vehicle width direction. 
     
     
       3. The vehicle body frame structure according to  claim 2 , wherein the engine hangers include holes formed therein; and the cross member is disposed upwardly, or upwardly and forwardly, of the holes. 
     
     
       4. The vehicle body frame structure according to  claim 1 , wherein the cross member is disposed near a connection between the main frames and the engine hangers. 
     
     
       5. The vehicle body frame structure according to  claim 1 , the vehicle further including an intake path that extends from the engine and is connected to an air cleaner disposed upwardly of the engine, the air cleaner having a front portion extended up to a point upward of the cross member. 
     
     
       6. The vehicle body frame structure according to  claim 1 , wherein the cross member is disposed on a level lower than an upper end portion of the engine. 
     
     
       7. The vehicle body frame structure according to  claim 1 , wherein the cross member is a first cross member, the vehicle body frame structure further comprising:
 a second cross member, said second cross member connecting upper portions of left and right pivot plates in the vehicle width direction; 
 a third cross member, said third cross member connecting lower end portions of the left and right pivot plates in the vehicle width direction; and 
 a gusset, said gusset being connected to a rear side of the head pipe, insides of front portions of the pair of left and right main frames, and insides of front portions of the left and right engine hangers in order to reinforce areas around the head pipe. 
 
     
     
       8. The vehicle body frame structure according to  claim 1 , wherein the cross member is disposed on a level lower than a vehicle longitudinal direction line that passes by an upper end portion of a cylinder head cover of the engine. 
     
     
       9. A saddle-riding type vehicle, comprising:
 a head pipe; 
 a pair of left and right main frames that extend rearwardly from the head pipe; 
 an engine disposed downwardly of the left and right main frames; 
 a fuel tank disposed upwardly of the engine and between the left and right main frames; and 
 a pair of left and right engine hangers that extend downwardly from front portions of the left and right main frames, the engine hangers being configured to support the engine; and 
 a cross member that connects the left and right engine hangers in a vehicle width direction, 
 wherein the main frames include connection holes formed therein, the connection holes being configured to connect with intake system ducts, and the cross member is disposed downwardly, or downwardly and rearwardly, of the connection holes. 
 
     
     
       10. The vehicle according to  claim 9 , wherein the cross member is disposed rearwardly of the connection holes and forwardly of a widest distance between the left and right main frames in the vehicle width direction. 
     
     
       11. The vehicle according to  claim 10 , wherein the engine hangers include holes formed therein; and the cross member is disposed upwardly, or upwardly and forwardly, of the holes. 
     
     
       12. The vehicle according to  claim 9 , wherein the cross member is disposed near a connection between the main frames and the engine hangers. 
     
     
       13. The vehicle according to  claim 9 , further comprising an intake path that extends from the engine and is connected to an air cleaner disposed upwardly of the engine, the air cleaner having a front portion extended up to a point upward of the cross member. 
     
     
       14. The vehicle according to  claim 9 , wherein the cross member is disposed on a level lower than an upper end portion of the engine. 
     
     
       15. The vehicle according to  claim 9 , wherein the cross member is a first cross member, the vehicle further comprising:
 a second cross member, said second cross member connecting upper portions of left and right pivot plates in the vehicle width direction; 
 a third cross member, said third cross member connecting lower end portions of the left and right pivot plates in the vehicle width direction; and 
 a gusset, said gusset being connected to a rear side of the head pipe, insides of front portions of the pair of left and right main frames, and insides of front portions of the left and right engine hangers in order to reinforce areas around the head pipe. 
 
     
     
       16. The vehicle according to  claim 9 , wherein the cross member is disposed on a level lower than a vehicle longitudinal direction line that passes by an upper end portion of a cylinder head cover of the engine.